Originally Posted by Fat phoopes
It's been said before that Triple and Rotation battles will be implemented eventually. However, they're pretty far down on the list of stuff to be added from what I understand, so don't expect them for a long time.
Quoting to point out that we still are finishing up DPPt, and are working on ADV, GSC, and RBY to be implemented ahead of Triple / Rotation battles. There are currently no important uses for Triple or Rotation battles, and it doesn't look like they'll have any important capacity (think VGC level importance) for quite some time.